SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for tkom.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- tkom.cz
- Valid from
- Jun 4, 2026
- Valid until
- Sep 2, 2026 (42 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06F375A270EB36EB3C8F1E812DB3A2BB8717
- SHA-256 fingerprint
- 90:57:D0:C6:37:85:96:8F:E9:20:14:E9:90:27:B2:24:05:93:F1:03:AC:15:AF:83:AA:E2:3C:3F:EF:47:58:8D
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.